Linq To Xml
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace LinqDemo
{
public class Book
{
public string Title;
public string Author;
public DateTime Year;
public Book(string author, string title, DateTime year)
{
Title = title;
Author = author;
Year = year;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using System.Xml;
using System.Diagnostics;
namespace LinqDemo
{
class Program
{
static void Main(string[] args)
{
Stopwatch sw = new Stopwatch();
for (int i = 0; i < 5;i++ )
{
sw.Reset();
sw.Start();
LinqtoXml();
sw.Stop();
Console.WriteLine("");
Console.WriteLine("the time of XElement execute:{0}", sw.ElapsedMilliseconds);
sw.Reset();
sw.Start();
XmlGeneral();
sw.Stop();
Console.WriteLine("");
Console.WriteLine("the time of XmlDocument execute:{0}", sw.ElapsedMilliseconds);
GC.Collect();
}
Console.Read();
}
public static void LinqtoXml()
{
Book[] books = new Book[]{
new Book("danche","世界是平的",Convert.ToDateTime("2013-3-1")),
new Book("谭一丹","今生缘",Convert.ToDateTime("2013-4-12"))
};
XElement xm = new XElement("books",
from book in books
select new XElement("book",
new XAttribute("author",book.Author),
new XElement("title",book.Title),
new XElement("year",book.Year)
)
);
Console.Write(xm);
}
public static void XmlGeneral()
{
Book[] books = new Book[]{
new Book("danche","世界是平的",Convert.ToDateTime("2013-3-1")),
new Book("谭一丹","今生缘",Convert.ToDateTime("2013-4-12"))
};
XmlDocument xdoc = new XmlDocument();
XmlElement xeml = xdoc.CreateElement("books");
foreach(Book book in books)
{
XmlElement xmlbook = xdoc.CreateElement("book");
xmlbook.SetAttribute("author",book.Author);
XmlElement xmltitle = xdoc.CreateElement("title");
xmltitle.InnerText = book.Title;
XmlElement xmlyear = xdoc.CreateElement("year");
xmlyear.InnerText = book.Year.ToString();
xmlbook.AppendChild(xmlyear);
xmlbook.AppendChild(xmltitle);
xeml.AppendChild(xmlbook);
}
xdoc.AppendChild(xeml);
xdoc.Save(Console.Out);
}
}
}
测试结果：
第一次输出：
<books>
<book author="danche">
<title>世界是平的</title>
<year>2013-03-01T00:00:00</year>
</book>
<book author="谭一丹">
<title>今生缘</title>
<year>2013-04-12T00:00:00</year>
</book>
</books>
the time of XElement execute:20
<?xml version="1.0" encoding="gb2312"?>
<books>
<book author="danche">
<year>2013-3-1 0:00:00</year>
<title>世界是平的</title>
</book>
<book author="谭一丹">
<year>2013-4-12 0:00:00</year>
<title>今生缘</title>
</book>
</books>
the time of XmlDocument execute:8
第二次输出：
<books>
<book author="danche">
<title>世界是平的</title>
<year>2013-03-01T00:00:00</year>
</book>
<book author="谭一丹">
<title>今生缘</title>
<year>2013-04-12T00:00:00</year>
</book>
</books>
the time of XElement execute:220
<?xml version="1.0" encoding="gb2312"?>
<books>
<book author="danche">
<year>2013-3-1 0:00:00</year>
<title>世界是平的</title>
</book>
<book author="谭一丹">
<year>2013-4-12 0:00:00</year>
<title>今生缘</title>
</book>
</books>
the time of XmlDocument execute:246
第三次输出：
<books>
<book author="danche">
<title>世界是平的</title>
<year>2013-03-01T00:00:00</year>
</book>
<book author="谭一丹">
<title>今生缘</title>
<year>2013-04-12T00:00:00</year>
</book>
</books>
the time of XElement execute:220
<?xml version="1.0" encoding="gb2312"?>
<books>
<book author="danche">
<year>2013-3-1 0:00:00</year>
<title>世界是平的</title>
</book>
<book author="谭一丹">
<year>2013-4-12 0:00:00</year>
<title>今生缘</title>
</book>
</books>
the time of XmlDocument execute:253
第四次输出：
<books>
<book author="danche">
<title>世界是平的</title>
<year>2013-03-01T00:00:00</year>
</book>
<book author="谭一丹">
<title>今生缘</title>
<year>2013-04-12T00:00:00</year>
</book>
</books>
the time of XElement execute:234
<?xml version="1.0" encoding="gb2312"?>
<books>
<book author="danche">
<year>2013-3-1 0:00:00</year>
<title>世界是平的</title>
</book>
<book author="谭一丹">
<year>2013-4-12 0:00:00</year>
<title>今生缘</title>
</book>
</books>
the time of XmlDocument execute:244
<books>
<book author="danche">
<title>世界是平的</title>
<year>2013-03-01T00:00:00</year>
</book>
<book author="谭一丹">
<title>今生缘</title>
<year>2013-04-12T00:00:00</year>
</book>
</books>
the time of XElement execute:219
<?xml version="1.0" encoding="gb2312"?>
<books>
<book author="danche">
<year>2013-3-1 0:00:00</year>
<title>世界是平的</title>
</book>
<book author="谭一丹">
<year>2013-4-12 0:00:00</year>
<title>今生缘</title>
</book>
</books>
the time of XmlDocument execute:249
从以上测试代码可以看出这两种操作xml的方法的执行效率的不同。
